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j UNITED STATES PATENT -OFFIGE.

i, WILLlAM H. NORDABY, or GERMANTOWN, NEW YORK, ASSIGNOR or ONE- HALF OF HIS RIGHT TO EDMOND ROOKERFELLER, OF SAME PLACE.

COMPOUND FOR REMOVING PAINT AND VARN ISH.

SPEGIFIGATION forming part of Letters Patent No. 224,841, dated February 24, 1880. I l r Application filed October 12, 1878.

surfaces of wood, metal, stone, &c.; and it consists in a composition formed of lime and sa l-soda dissolved in water and aqua-ammonia 1 and creosote.

To produce my improved compound, take twenty pounds of lime (oxide of lime) and dissolve the same in five gallons of soft or rain water. Take, also, twenty pounds of sal-soda and dissolve thesame in' another five gallons of soft or rain water. Then thoroughly mix the said two solutions together, after which add to the whole quantity of mixed lime and soda solutions one and one-quarter fluid pound of i aqua ammonia and ten fluid ounces of creosote,'and stir the same in thewhole body of lime and soda solutions until they are thor-t oughlymixed and incorporated therewith. The

andloecomes an active agent for dissolving compound will then be readyfor use, though, when permitted to stand for some length of time tightly covered or inclosed, it will operate better with the paint or varnish to beremoved. When the above-mentioned ingredients are mixed in or about in the proportions named the carhonate of soda is decomposed by the the dried oils in the paint and varnish, while the creosote, bem g a solvent of gums and res- -ins and resinous elements, acts powerfully on the gums and resins in the varnish to be removed, so that the caustic alkali before named may more readily saponify them.

In using this compound I stir the same well before applying it, so that the settled portions will be thoroughly mixed with the fluid portions. I In applying this compound to the paint or varnish to be removed, I use a brush or swab of sponge, cloth, or other material, and coat the entire surface of the paint or varnish. The compound is then permitted to remain in its pasty form until it appears to have become dried.

One application will soften and saponify the varnish down to the paint beneath, and,

if it is desired to remove the varnish only, I then remove the softened varnish and the adhering solid and dried portions of the compound and wash the surfaces thoroughly to remove the alkaline matter which may remain; but ifit is desired to remove the paint beneath as well as the varnish, I apply a second coat of the compound over the first and dried coat, and permit the second coat to dry the same as the first coat, after which the paint may be readily removed by means of a puttyknit'e after the coating has been wet-ted by water, and when the paint has been removed 1 wash the surface wellwith water to remove solid portions operate mechanically to hold the liquid portions in a larger quantity and for a longer time on either level, rounded, or ver tical surfaces than the liquid portions would be held were they only used.

Hm ingdescribed myinvention, what I claim 1s A compound for removing paintor varnish composed of lime, Sal-soda, aqua-ammonia, and

creosote in the proportions described, for the purposes 'set forth.

WILLIAM H. NORDABY.

Witnesses ALEX. SELKIRK, CHARLES SELKIRK. 

